Twister stop-motion.



T. E. SMITH. TWISTER STOP MOTION.

APPLICATION FILED 0CT.11, 1910.

Patented July 30, 191 2.

2 SHEETSSHEET 1.

T. H. SMITH.

TWISTER STOP MOTION.

APPLICATION FILED 00m. 11, 1910.

1,033,960. Patented July 30,1912.

2 SHEETS-SHEET 2.

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 4:.

FTC.

TWISTER STOP-MOTION.

To all whom it may concern:

Be it known that I, THOMAS HENRY SMITH, a citizen of the United States, and resident of Jamestown, in the county of Chautauqua and State of New York, have invented a new and useful Improvement in Twister Stop-Motions, of which the following, taken in connection with the accompanying drawing, is a full, clear, and exact description.

The invention relates to stop motions for twisting machines for multiple threads and is an improvement upon the multiple stop motion, as shown in my Letters Patent No. 967,987, issued the 23rd day of August, 1910; and the object of this improvement is to provide a guide latch for the multiple threads by means of which the threads will be gathered to one point for twisting and at the same time provide a guide in the latch form which can be instantly released from or closed upon a number of threads and gives a larger circumferential contact and necessary friction with the top roll, and the invention consists in the construction and arrangement of the parts as shown in this specification and the accompanying drawings and pointed out in the claims.

In the drawings, Figure 1 is a side elevation of the roll stand showing the improved stop motion with the thread and parts in normal position when the thread is unbroken and showing in dotted lines the stopping action of one of the pivotally mounted thread guide-stops on the top roll when the thread breaks. Fig. 2 is a detail side elevation of one of the guide stop wires for the thread. Fig. 3 is an elevation of the stop motion facing the rolls and showing the guide latch in the closed position. Fig. 4 is a plan view of the roll and stopping mecha nism. Fig. 5 is a perspective view of the multiple stop mechanism showing the parts including the uide latch in the normal position for holding the thread. Fig. 6 is an elevation of the staple-shaped pin for holding the thread guide-stops. Fig. 7 is a perspective view of the guide latch for the thread.

' Similar numerals refer to corresponding part-s in the several views.

The numeral 10 indicates the roll stand, which supports the lower roll 11 revolubly mounted therein and has suitable means for Specification of Letters Patent.

Application filed. October 11, 1910.

Patented July 30, 1912.

Serial No. 586,499.

hold the short frictional upper rolls 14 in position directly above lower roll 11 and in such a manner that upper rolls 14 are independent of each other and free to be revolved by frictional contact with lower roll 11. The brackets 13 are not shown in Fig. 1 in order to more clearly show the action of the stopping mechanism,

The stopping mechanism consists of a slotted metal holding piece 15 for each pair of rolls 11 and 14, which piece 15 is attached to cap bar 12 by means of lugs 16 and 17 which extend down on opposite sides of bar 12 and a set screw 18 preferably in lug 16. Piece 15 has a number of deep crosswise slots 19 on its upper side to receive the thread guide-stops 20 therein and a central slot 34 for the thread 27. The thread guidestops 20 may be stamped out of sheet steel but are preferably made of wire with a loop 21 which extends down into slot 19. A lengthwise hole extends through piece 15 to receive the staple pin 22, which is formed with a return bend 23 along the outer side of the piece 15 for a purpose hereinafter described. The thread guide-stops 20 have pig-tail rear ends 24 to receive the threads 27 as they come from the spool to the rolls. The front ends 25 of guides 20 are pointed and curve downwardly in the rear of roll 14, as shown. It is apparent that there may be as many slots 19 and guides 20 in piece 15 as there are threads to be twisted. The roll 14 has a lengthwise groove 26 to receive the ends 25 of thread guide-stops 20 when the thread breaks, as shown in dotted line in Fig. 1. The groove 26 may be cut diagonally across the periphery of the roll 14 in order not to cut the threads 27 as they pass be tween the revolving rolls.

A groove 28 is cut diagonally across the end of piece 15 and pin 22 is slidably mounted in piece 15 so that when the outer arm 23 of the pin is raised to the position shown in Fig. 5, it is held firmly in position and likewise holds the thread guide-stops in firm position because of the angle of the groove 28, into which the pin fits. This position of the staple pin 22 renders the stopping action of the thread-guides inoperative, converting the guide-stop into a guide only, the action of the stop not being needed when two ply threads only are twisted, and also holds up the pig-tails, making them easy to thread when piecing up.

In order to bring the threads 27 together low down behind roll 14 a guide latch 29 and groove 34 are provided, which latch is mounted upon piece 15 in the following manner: A flange 30 extends out from piece 15 at each side of the ends 25 of thread guidestops 20 and the slots 19. One end of latch 29 is inserted through a hole 31 in piece 15 through one of the flanges 30. The latch 29 is bent upward and downward so as to form a \l-shaped angle 32 beneath which the threads 27 run after passing through slot 34, The other flange 30 is provided with a slot 33 which is formed at the angle of the latch 29to form a catch for the movable end. The end of latch 29 extends out beyond slot 3.3 and the end'of piece 15 so that it can be easily grasped by the finger-s. The latch 29 is bent so as to spring int-o notch 33 and hold firmly therein. It is apparent that the latch may be easily sprung out of notch 33 and turned entirely out of the way of the threads 27 when a thread breaks so that the broken thread or threads may be quickly united, after which the latch is instantly returned to the notch and the threads gather in slot 34 and beneath the V-shaped latch without further attention from the operator.

To operate the stopping mechanism, the latch 29 is thrown back, the threads 27 are threaded through pig-tails 24, one end to each thread guide-stop 20, the number of thread guide-stops, corresponding tov the number of ends to be twisted. These ends are all passed over the upper roll 14 and back over under roll and thence to the bobbin below. The latch 29 is then closed over the threads drawing them down into slot 34. It is apparent that the threads will run smoothly without any obstruction through slot 34 and beneath the guide-latch 29 until one of the threads break, in which event the rear end of guide stop 20 drops, as shown in dotted lines in Fig. 1, and the front end 25 presses against roll 14 until diagonal slot 26, is encountered, when end 25 enters slot 26, thereby positively stopping and holding roll 14 and the threads which are being twisted by roll 14. The continued motion of the spindle below will quickly twist off these threads and the end may then hang loose from. the pig tail 35 on the doffing board without waste until connected up bythe operator.

The pig-tails 24 form separate guides for each of the ends as the thread descends from the bobbin and slot 34 and guide latch 29 gather the threads together low in the rear of top roll 14 and latch 29 is placed low down in relation to said roll in order to draw thethreads down upon said roll and increase individual thread guides for each of the ends.

It will be observed that when the pig tails 24 of the thread guide stops 20 are held up in place by the arm 23 of pin 22 in groove 28 in order to piece up a thread, that looking end 25 of the thread guide stop will be withdrawn from groove 26 and that the roll 14 will be left free to revolve unless held therefrom. For this purpose my front stop mo.- tion device, as shown in my Letters Patent Numbers 749,859 773,037, and 7 7 3,038 is used. The front stop motion works in connection with the present multiple stop motion holding the top roll; 14 while the end is being pieced up.

I claim as new:

1. A device of the class described consisting of a top roll: and an under roll to receive the yarn therebetween and means for turn,-

ing said under roll, mechanism in the rear mechanism, an indented or V-shaped thread latch pivotally attached to said mechanism to confine or release the thread, and a cat-ch on said mechanism for said latch.

2. A device of the class described consisting of a top roll and an under roll to re ceive the yarn therebetween and means for turning said under roll, a. cap bar, a. piece on said cap bar having crosswise slots, said top roll having a groove on its outer surface, thread guides pivot-ally mounted in said slots, projecting ends on said guides to engage said groove and stop said top roll, and an indented or V-shaped thread latch pivotally mounted on said piece to confine or release the threads, said piece having a catch groove thereon for said latch, substantially as and for the purpose specified.

3.. In a device of the class described, a

frame, a bottom roll on said frame andsuitable means for turning the same, a top roll on said frame frictionally driven by said bottom roll, said top roll having a diagonal; groove on its outer surface, a cap. bar behind said roll, a piece on said cap bar having crosswise slots therethrough, thread guides;

piece having acatch groove thereon for said,

name to this specification in the presence of two subscribing Witnesses.

THOMAS HENRY SMITH. Witnesses:

A. W. TUTTLE, I. A. ELLSWORTH.

latch, and projecting ends on said thread guides to engage said groove in said top roll and stop the same when the thread breaks, substantially as and for the purpose speci fied.

In testimony whereof I have signed my Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

